Have had several occasions where I have seen craft that I or surrounding eyewitnesses couldn't explain. The first time was in the mid 90's. Hanging out with a group of friends one summer night in my buddy's front yard. About 150 to 200 yards from where we were standing, a craft rose out from the trees. It gave off an alternating glow of white and green. Once it got above the treetops it turned blue and flew off to the east and either flew at such a speed we couldn't see it or it disappeared altogether. The whole incident lasted no more than 10 seconds. At least 6 of us saw it. I have seen groups of orange orbs on several occasions too. I live in a flight path so I know what normal aircraft look and behave like when flying. The orbs will suddenly appear one by one, sometimes doing some crazy maneuvers but not always and then one by one disappear. Everytime I have seen the orbs there have also been other eyewitnesses.